Casting machine



Aug; 4, `1925.

` 1,548,602 c. E, HOPKINS CASTINGV MACHINE rgna Filed March 2, 1922 2 Sheets-Sheet l Aug. 4, 1925.

C. E. HOPKINS CASTING- MACHlNE Driginal" Filed March 2. 1922 2 sneet-sheet" 2 Patented Aug. 4, 1925.

CHARLES E. HOPKINS, DECEASED, LATE OF PLAINFIELD, NEW JERSEY; BY THE PLAIN- I 1,548,502 PATENT oFF-ICE.

FIELD TRUST COMPANY, ADMINISTRATOR, OF PLAINFIELD, NEW JERSEY.

CASTING MACHINE.

Original application led March 2, 1922, Serial No. 540,481. Divided and this application iiled November 17, 1924. Serial No. 750,242.

pump, for feeding metal to a closed casting chamber, in which the usual spring relief generally employed in devices of this character will not be necessary and in which the metal will be maintained at a proper temperatnre.-

This application is a division-of appli-i cation Ser. blo-540,481, liled March 2, 1922.

In the accompanying drawings the invention is disclosed in a concrete and preferredform in which:

Fig. l is a side elevation of a metal pump embodying the invention.

Fig. 2 is a vertical sectional view.

11 and 12 indicate mold members forming a closed mold with which communicates the constantly open nozzle 99' carried by spout 10 leading to melting furnace A. This spout vmay conveniently Vbe formed 'integral with cross frame E, and terminates .in what is 'virtually a xed hollow plunger 86. 87 is the pump chamber sliding up and down with respect. to plunger 86, said chamber having a valve opening 94 in its bottom. Said pump chamber is actuated by a tie rod` 89, extending below opening 94, and this tie rod is carried by two vertical rods 88, one on each side of the cylinder or pump chamber and extending loosely through guides 88a thereof. At their upper ends rods 8 8 are connected by a short shaft 90, and connected to this shaft is a rod 91 the upper end of which is mounted on arm 92 of rock -shaft 93 car-l ried `by the framework of the machine.

94a is a spring'coiled about shaft 93 and with-one end anchored on the framework. The tension of this sprin normally tends through the connections escribed to move the pump cylinder down. 'Other means, to

. be presently described, turn shaft 93 inthe other direction to lift `the ump chamber. It will be understood that, w en the connec- -higher level than the nozzle.

tions are raised, cross piece 89 will be moved upwardlyuntil opening 94 is closed and that thereafter said cross piecewill lift the pump cylinder, thereby feedingy metal up through the spout. On the reverse movement, when spring .94 is effective, collarsv 95, on rods 88, will engage the top of the cylinder and force it down, thereby overcoming the tendency of the plunger and cylinder to'adhere and thereby, at the same time, opening valve 94. Continued movement of the parts in the same direction will then lower the pump cylinder, completely and allow metal to flow in through opening 94.

96 indicates an equalizing chamber or auxiliaryreservoir above nozzle 99. The capacity of the pump cylinder, the spout and the equalizing chamber is such that a full stroke of the cylinder, will `raise the molten metal to a level above nozzle` 99 so` that the equalizing chamber acts as a head for the casting chamber. This construction renders unnecessary the usual spring relief generally employed in connection` therethrough' is governed entirely by the pump. 98 indicates an airvent to permit the air to escape as the metal rises and also 100 and a rod 101 operated by a crank orv members, a reservoir of molten metal, conf nections, including a nozzle, for conducting metal from the reservoir to the mold members, an auxiliary reservoir in communication with said connections and nozzle and located above the latter, and a pump for feeding metal through said connections.

annozzle and into the Vauxiliary reservoir to vcreate a. head of metal above the nozzle.

2. A casting' machine comprising: mold members, a reservoir of molten metal, connectlons, including a nozzle, for conductmg metal :from thel reservoii` to the-mold mem-v bers, an auxlllary neservmr 1n communice-v `ation with said connections and nozzle and located above'the later, and a pump ,for feeding metal through said connectionsand nozzle end into the auxiliary lreservoir to ycreate e head of metal above the nozzle amdA THE PLAINFIELD TARUST COMLANY.

Administrator of Charles E. Hopkins, deceased. i

By H. DOUGIIS DVES, v Assi. sect1/ and Trust Oicer. l 

